
Keywords: 3'-5'-cyclic adenosine monophosphate; Formaldehyde; Glutaraldehyde; Retina; Fixatives; Antigen retrieval; Quenching; Sucrose; pH; cAMP; 3â²-5â²-cyclic adenosine monophosphate; GPI; glycosylphosphatidylinositol; HCN; hyperpolarization-activated cyclic nucleotide-gated; HEPES; 4-(2-hydroxyeth